The antex files give the phase law to apply in DORIS processing. doris_phase_law_antex_alcatel.txt : phase law for alcatel ground antenna (type A) doris_phase_law_antex_starecBC.txt : phase law for starec ground antenna (types B and C) NB: doris_phase_law_antex_starec.txt is a copy of doris_phase_law_antex_starecBC.txt See FAQ "About the 4-letter code" of the ground station on the IDS website at https://ids-doris.org/faq.html The phase law are given in accordance with antex format : in mm, function of zenith angle. The correction given have normally to be applied directly (no change of sign). The antex files provided by IDS are based on the antex format developped by IGS. (see description: ftp://igs.org/pub/station/general/antex14.txt ) Characteristics specific to DORIS not described in IGS format: -Satellite sytem: 'D' : DORIS -Frequency codes: 'D01' - 2036,25MHz 'DO2' - 401,25 MHz Logs: 2019 December: Erratum Ground antenna types The name STAREC D is abandoned Following new measurements in the anechoic chambers it appeared that the antennas that were named STAREC D have exactly the same characteristics as the antennas named STAREC C. As a consequence, the antex starec D phase law file doris_phase_law_antex_starecD.txt is removed and the related documents are corrected. See DORISmail 1202 ftp://ftp.ids-doris.org/pub/ids/dorismail/dorismail.1202 2019 July *Starec type D: A new type of ground antenna is introduced in the network and named Starec D (first antenna "STKD" installed at St-John's). The design is similar to antenna Starec B and C but with a different center of phase and a different phase law. distance from DORIS reference point to phase center 2 GHZ: +453 mm distance from DORIS reference point to phase center 400 MHZ: -39 mm A new antex file is provided for Starec antenna type D: doris_phase_law_antex_starecD.txt The antex file for Starec antenna types B and C is revised and renamed as doris_phase_law_antex_starecBC.txt Note that the file doris_phase_law_antex_starec.txt is kept online but is now a copy of doris_phase_law_antex_starecBC.txt It can be used for Starec B and C but not for Starec D. 2017 May *ANTEX FORMAT: format of the antex files revised and corrected to be in agreement with the format description first versions renamed with extension "_old" and kept in the directory *ALCATEL: new characterization of the ALCATEL antenna based on 5 antennas -the new file is named doris_phase_law_antex_alcatel17.txt -the previous version (after format revision and correction) of the file is renamed doris_phase_law_antex_alcatel13.txt -the file doris_phase_law_antex_alcatel.txt is now a copy of the file doris_phase_law_antex_alcatel17.txt *STAREC: the file doris_phase_law_antex_starec.txt is a copy of the file doris_phase_law_antex_starec13.txt (after format revision and correction) 2013 Apr *ALCATEL: creation of the antex file doris_phase_law_antex_alcatel.txt NB: the number of individual antennas calibrated given is not guaranteed *STAREC: creation of the antex file doris_phase_law_antex_starec.txt NB: the number of individual antennas calibrated given is not guaranteed